Major types of injuries:
(1) fracture and other orthopedic injuries
(2) head and/or spinal injury
(3) skin abrasions and lacerations
Risk factors for injuries:
(1) driver <= 15 years of age
(2) being a passenger
(3) intoxication with drugs and/or alcohol
(4) excessive speed for terrain and/or when negotiating a turn
(5) riding on hillsides with excessive slope
(6) lack of proper training
(7) failure to wear a helmet and goggles
(8) environmental hazards such as low hanging tree branches
(9) riding recklessly and taking chances
